SILVA, S.C.FERREIRA, E.A.FARIA, R.N.TAKIISHI, H.2014-07-152014-07-302014-07-152014-07-302008SILVA, S.C.; FERREIRA, E.A.; FARIA, R.N.; TAKIISHI, H. The effect of the processing temperature on the microstructures of Pr-Fe-Co-Nb HDDR magnets. <b>Materials Science Forum</b>, v. 587-588, p. 108-113, 2008. DOI: <a href="https://dx.doi.org/10.4028/www.scientific.net/MSF.591-593.108">10.4028/www.scientific.net/MSF.591-593.108</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/4908.0255-5476http://repositorio.ipen.br/handle/123456789/4908Pr14FebalCoxB6Nb0.1 magnets have been produced using the hidrogenation disproportionation desorption recombination (HDDR) process. The effect of the Co content (x= 0, 4, 8, 10, 12, 16) and the reaction temperature (800-900 ºC) on the microstructure and magnetic properties of the HDDR material have been investigated. The processing temperature (desorption/recombination) affected the microstructure and magnetic properties of the bonded magnets. The alloy with low cobalt content (4 at.%) required the highest reaction temperature (880°C) to yield anisotropic bonded magnets. The optimum temperature for alloys with 8 at.% Co and 10 at.% Co were 840°C and 820°C, respectively. Alloys with high cobalt content (12 at.% and 16 at.%) were processed at 840°C. Each alloy required an optimum reaction temperature and exhibited a particular microstructure according to the composition. Pr14Fe80B6Nb0.1 magnets have been processed for comparison.108-113openAccesspermanent magnetspraseodymium alloysiron alloyscobalt alloysboron alloysniobium alloysmagnetic propertiesscanning electron microscopyArtigo de periódico587-58810.4028/www.scientific.net/MSF.591-593.108